Successful mystery novelist Richard Castle starts working with the New York Police Department (NYPD) homicide investigation team after a serial killer decides to use plots from his novels for no good.
Premiered: March 9, 2009
Season 4, Episode 4 Kick the Ballistics
First Aired: October 10, 2011
Castle and Beckett go after a serial killer who stole Ryan's gun after the weapon gets linked to a young woman's homicide.
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